let user = {
  name: "后盾人",
  site: ["hdcms", "houdren"]
};
let json = JSON.stringify(user, null, 2);
console.log(json);
let jsonObj = JSON.parse(json);
console.log(jsonObj);
console.log(jsonObj.name);

let arr = ["hdcms.com", "houdunren.com"];
let jsonArr = JSON.stringify(arr, null, 2);
console.log(jsonArr);
let jsonArray = JSON.parse(jsonArr);
console.log(jsonArray);
console.log(jsonArray[0]);
